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Deep-blue organic light-emitting diodes based on a doublet d-f transition cerium(Ⅲ) complex with 100% exciton utilization efficiency

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Light(Science & Applications) 2020年第1期9卷 521-529页

作者： Liding Wang Zifeng Zhao Ge zhan.Huayi Fang Hannan Yang Tianyu Huang Yuewei zhan. Nan Jiang Lian Duan Zhiwei Liu Zuqiang Bian Zhenghong Lu Chunhui Huang Beijing National Laboratory for Molecular Sciences(BNLMS) State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsBeijing Engineering Technology Research Centre of Active DisplayCollege of Chemistry and Molecular EngineeringPeking University100871 BeijingChina Tianjin Key Lab for Rare Earth Materials and Applications School of Materials Science and EngineeringNankai University300350 TianjinChina Department of Physics Yunnan University2 Cuihu Bei Lu650091 KunmingChina Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua University100084 BeijingChina

Compared to red and green organic light-emitting diodes(OLEDs),blue OLEDs are still the bottleneck due to the lack of efficient emitters with simultaneous high exciton utilization efficiency(EUE)and short excited-state *** from the fluorescence,phosphorescence,thermally activated delayed fluorescence(TADF),and organic radical materials traditionally used in OLEDs,we demonstrate herein a new type of emitter,cerium(Ⅲ)complex ce-1 with spin-allowed and parity-allowed d-f transition of the centre ce^(3+) *** compound exhibits a high EUE up to 100% in OLEDs and a short excited-state lifetime of 42 ns,which is considerably faster than that achieved in efficient phosphorescence and TADF *** optimized OLEDs show an average maximum external quantum efficiency(EQE)of 12.4% and Commission Internationale de L’Eclairage(CIE)coordinates of(0.146,0.078).

关键词： diodes emitter transition

绿盲蝽对性信息素类似物和植物挥发物的触角电位反应

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昆虫学报 2010年第1期53卷 47-54页

作者：陈展册苏丽戈峰苏建伟广西大学农学院南宁530005 中国科学院动物研究所农业虫害鼠害综合治理研究国家重点实验室北京100101

为了更好地利用性信息素类似物与植物挥发物对绿盲蝽Lygus lucorum进行监测和生物防治,本研究采用电生理学方法测试了绿盲蝽成虫对9种性信息素类似物和12种植物挥发性物质的触角电位(electroantennogram,EAG)反应。结果表明:在测试的这2... 详细信息

为了更好地利用性信息素类似物与植物挥发物对绿盲蝽Lygus lucorum进行监测和生物防治,本研究采用电生理学方法测试了绿盲蝽成虫对9种性信息素类似物和12种植物挥发性物质的触角电位(electroantennogram,EAG)反应。结果表明:在测试的这21种化合物中,绿盲蝽对丁酸酯类化合物和绿叶气味物质的EAG反应较强;雄虫对性信息素类似物比雌虫更敏感,而雌虫对植物挥发物更敏感。其中性信息素类似物中,绿盲蝽对反-2-丁酸己烯酯的EAG反应最强;植物挥发物中,绿盲蝽对反-2-己烯醛的EAG反应最强,雌虫对反-2-己烯醇、反-2-己烯醛、顺-3-己烯醇等绿叶气味物质的EAG反应相对高于萜类化合物的反应。剂量反应曲线表明,在测定的浓度范围内,雄虫对反-2-丁酸己烯酯的反应比雌虫显著高,而对β-蒎烯的反应则比雌虫显著低。绿盲蝽成虫对性信息素类似物和植物挥发物的EAG反应存在的两性差异具有生态适应意义:雄虫对性信息素类似物更敏感将更有利于其寻找交配对象,而雌虫对绿叶气味物质更敏感将更有利于其寻找产卵寄主。

关键词：绿盲蝽性信息素植物挥发物触角电位剂量反应

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聚烯烃导热复合材料老化性能的研究

塑料工业 2008年第B6期36卷 195-197页

作者：孙占英张陆旻戴干策华东理工大学化学工程联合国家重点实验室上海200237

研究了聚丙烯与交联聚乙烯两种聚烯烃导热材料在30%的硫酸溶液、10%的氢氧化钠溶液以及紫外线照射条件下的老化性能;并采用傅里叶红外光谱仪进行了分析。结果表明,两种导热材料的老化机理存在着不同,溶液增塑、基体结晶、交联聚乙烯交... 详细信息

研究了聚丙烯与交联聚乙烯两种聚烯烃导热材料在30%的硫酸溶液、10%的氢氧化钠溶液以及紫外线照射条件下的老化性能;并采用傅里叶红外光谱仪进行了分析。结果表明,两种导热材料的老化机理存在着不同,溶液增塑、基体结晶、交联聚乙烯交联度的破坏共同作用导致材料性能上的改变,紫外线照射亦有较大影响。

关键词：聚丙烯交联聚乙烯导热材料老化

舌癌组织中淋巴管密度与淋巴道转移关系的研究

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口腔生物医学 2011年第1期2卷 26-29页

作者：战策张壮同济大学附属口腔医院上海200072 四川大学华西口腔医院四川成都610041

目的:研究舌癌组织中淋巴管密度(lymphatic vessel density,LVD)和舌鳞状细胞癌患者淋巴道转移的相关性。方法:舌癌样本来自138例实施舌癌切除术的患者。利用单克隆抗体D2-40进行免疫组织化学染色。对照正常组织和肿瘤组织中LVD的差异... 详细信息

目的:研究舌癌组织中淋巴管密度(lymphatic vessel density,LVD)和舌鳞状细胞癌患者淋巴道转移的相关性。方法:舌癌样本来自138例实施舌癌切除术的患者。利用单克隆抗体D2-40进行免疫组织化学染色。对照正常组织和肿瘤组织中LVD的差异。利用Spearman相关分析评估舌癌患者的LVD和临床病理因素的联系。结果:舌癌组织中LVD明显高于正常组织(P<0.01)。已发生转移的肿瘤组织中LVD明显高于未转移肿瘤组织(P<0.01)。LVD与舌癌患者T分期、分级、淋巴结状态和临床分期(r=0.229,0.221,0.794,0.740)具有紧密联系。结论:LVD有规律的增长可能是舌癌发展的一个重要特征,有助于预测舌癌患者早期的淋巴转移。

关键词：舌鳞状细胞癌生物标记淋巴转移免疫组织化学

Enhanced segmentation of gastrointestinal polyps from capsule endoscopy images with artifacts using ensemble learning

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World Journal of Gastroenterology 2022年第41期28卷 5931-5943页

作者： Jun-Xiao Zhou zhan.Yang Ding-Hao Xi Shou-Jun Dai Zhi-Qiang Feng Jun-Yan Li Wei Xu Hong Wang Department of Gastroenterology and Hepatology Guangzhou First People’s HospitalGuangzhou 510180Guangdong ProvinceChina School of Information Renmin University of ChinaBeijing 100872China

BACKGROUND Endoscopy artifacts are widespread in real capsule endoscopy(ce)images but not in high-quality standard *** To improve the segmentation performance of polyps from ce images with artifacts based on ensemble *** We collected 277 polyp images with ce artifacts from 5760 h of videos from 480 patients at Guangzhou First People’s Hospital from January 2016 to December *** public high-quality standard external datasets were retrieved and used for the comparison *** each dataset,we randomly segmented the data into training,validation,and testing sets for model training,selection,and *** compared the performance of the base models and the ensemble model in segmenting polyps from images with *** The performance of the semantic segmentation model was affected by artifacts in the sample images,which also affected the results of polyp detection by ce using a single *** evaluation based on real datasets with artifacts and standard datasets showed that the ensemble model of all state-of-the-art models performed better than the best corresponding base learner on the real dataset with *** with the corresponding optimal base learners,the intersection over union(IoU)and dice of the ensemble learning model increased to different degrees,ranging from 0.08%to 7.01%and 0.61%to 4.93%,***,in the standard datasets without artifacts,most of the ensemble models were slightly better than the base learner,as demonstrated by the IoU and dice increases ranging from-0.28%to 1.20%and-0.61%to 0.76%,*** Ensemble learning can improve the segmentation accuracy of polyps from ce images with *** results demonstrated an improvement in the detection rate of polyps with interference from artifacts.

关键词： Artifacts Capsule endoscopy Polyps Ensemble learning Segmentation Robustness

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搅拌式生物反应器中造血细胞的灌注培养

生物工程学报 2005年第4期21卷 622-627页

作者：迟占有姜华蔡海波谭文松戴干策华东理工大学生物反应器工程国家重点实验室上海200237

为了消除造血细胞静态培养中存在的浓度梯度和搅拌悬浮培养时换液引起的波动,为造血细胞体外扩增提供更理想的培养环境和操作方式,利用自主开发的造血细胞重力沉降截留系统结合有溶氧和pH控制的生物反应器进行了脐血造血细胞的灌注培养... 详细信息

为了消除造血细胞静态培养中存在的浓度梯度和搅拌悬浮培养时换液引起的波动,为造血细胞体外扩增提供更理想的培养环境和操作方式,利用自主开发的造血细胞重力沉降截留系统结合有溶氧和pH控制的生物反应器进行了脐血造血细胞的灌注培养。两次灌注培养中总细胞分别扩增11·5和18·6倍,扩增倍数最大时,CFU_Mix分别扩增23·2倍和20·4倍、CFU_GM扩增13·9倍和21·5倍、BFU_E扩增8·0倍和6·9倍、CD34+细胞扩增17·1倍和15·4倍。培养到12d时,第一次实验由267×106单个核细胞扩增得到1082×106个总细胞,6·31×106个CFU_GM,6·2×106个CFU_Mix和23×106个CD34+细胞;第二次实验由180×106单个核细胞扩增得到1080×106个总细胞,4·65×106个CFU_GM,11·0×106个CFU_Mix和25·0×106个CD34+细胞,这达到了临床规模,由于控制了较低的溶氧和稳定的培养环境,细胞中干/祖细胞含量显著高于方瓶。但灌注培养到后期细胞密度达到较高后,细胞生长受到抑制,这应该是由细胞密度过高本身所引起。搅拌式反应器中进行灌注培养有利于造血干/祖细胞的进一步扩增,培养得到的细胞中干/祖细胞含量较高,培养规模达到了临床要求,但过高的细胞密度将对造血细胞的生长产生抑制。

关键词：脐血造血细胞生物反应器灌注培养

Retrieving volume FeO and TiO_2 abundances of lunar regolith with ce-2 ceLMS data using BPNN method

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Research in Astronomy and Astrophysics 2019年第5期19卷 31-42页

作者： Cai Liu Hong-Yan Sun Zhi-Guo Meng Yong-Chun Zheng Yu Lu zhan.Chuan Cai Jin-Song Ping Alexander Gusev Shuo Hu College of Geoexploration Science and Technology Jilin University State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and Technology Key Laboratory of Lunar and Deep Space Exploration National Astronomical Observatories Chinese Academy of Sciences School of Geography and Ocean Science Nanjing University Jiangsu center for Collaborative Innovation in Geographical Information Resource Development and Application Institute of Geology Kazan Federal University

The volume FeO and TiO_2 abundances(FTAs) of lunar regolith can be more important for understanding the geological evolution of the Moon compared to the optical and gamma-ray results. In this paper, the volume FTAs are retrieved with microwave sounder(ceLMS) data from the Chang'E-2 satellite using the back propagation neural network(BPNN) method. Firstly, a three-layered BPNN network with five-dimensional input is constructed by taking nonlinearity into account. Then, the brightness temperature(TB) and surface slope are set as the inputs and the volume FTAs are set as the outputs of the BPNN ***, the BPNN network is trained with the corresponding parameters collected from Apollo, Luna,and Surveyor missions. Finally, the volume FTAs are retrieved with the trained BPNN network using the four-channel TBderived from the ceLMS data and the surface slope estimated from Lunar Orbiter Laser Altimeter(LOLA) data. The rationality of the retrieved FTAs is verified by comparing with the Clementine UV-VIS results and Lunar Prospector(LP) GRS results. The retrieved volume FTAs enable us to re-evaluate the geological features of the lunar surface. Several important results are as follows. Firstly, very-low-Ti(ces with TiO_2> 5 wt.% constitute less than 10% of the maria. Also, two linear relationships occur between the FeO abundance(FA) and the TiO_2 abundance before and after the threshold, 16 wt.% for FA. Secondly, a new perspective on mare volcanism is derived with the volume FTAs in several important mare basins, although this conclusion should be verified with more sources of data. Thirdly, FTAs in the lunar regolith change with depth to the uppermost surface,and the change is complex over the lunar surface. Finally, the distribution of volume FTAs hints that the highlands crust is probably homogeneous, at least in terms of the microwave thermophysical parameters.

关键词： planetary systems Moon evolution imaging spectroscopy data analysis

基于特征空间优化的随机森林算法在GF-2影像湿地分类中的研究

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地球信息科学学报 2018年第10期20卷 1520-1528页

作者：詹国旗杨国东王凤艳辛秀文国策赵强吉林大学地球探测科学与技术学院长春130012

由于季节性的植被动态和水文波动,湿地遥感影像分类常常比较困难。本文采用优化特征空间的随机森林算法(Random Forest)对吉林省白城市通榆县东部地区预处理后的GF-2影像进行湿地分类研究,具体分为2步:(1)对研究区遥感影像进行多尺度分... 详细信息

由于季节性的植被动态和水文波动,湿地遥感影像分类常常比较困难。本文采用优化特征空间的随机森林算法(Random Forest)对吉林省白城市通榆县东部地区预处理后的GF-2影像进行湿地分类研究,具体分为2步:(1)对研究区遥感影像进行多尺度分割和对象特征的提取。针对一些学者获取最佳分割尺度时仍受主观因素影响较大的情况,本文通过改进全局最优分割方法来获得最佳分割尺度。(2)在最优分割的基础上,基于特征重要性对随机森林分类算法的特征空间进行优化,以得到最佳的随机森林分类结果,并与相同条件下(同数据、同分割尺度、同训练样本,同特征空间)的K-NN、SVM、CART 3种算法以及未优化特征空间的RF算法的分类结果进行了比较。结果表明,基于优化特征空间的RF算法的分类结果总精度和Kappa系数分别为93.038%和0.9177,而K-NN、SVM和CART 3种分类算法的分类结果的总精度分别为83.357%、78.068%、77.136%,未优化特征空间的RF算法分类结果总精度为90.937%。相较于K-NN、SVM、CART 3种分类算法,RF算法在GF-2湿地影像数据中具有更好的分类性能,同时优化特征空间的RF算法精度有所提高,在湿地资源管理中可以发挥非常重要的作用。

关键词： GF-2影像面向对象随机森林湿地分类最优分割尺度特征空间优化

Burst Phase Distribution of SGR J1935+2154 Based on Insight-HXMT

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Research in Astronomy and Astrophysics 2023年第3期23卷 68-74页

作者： Xue-Feng Lu Li-Ming Song Ming-Yu Ge You-Li Tuo Shuang-Nan zhan. Jin-Lu Qu ce Cai Sheng-Lun Xie Cong-zhan.Liu Cheng-Kui Li Yu-Cong Fu Ying-Chen Xu Tian-Ming Li Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang 050024China Institute of Astrophysics Central China Normal UniversityWuhan 430079China

On 2020 April 27,the soft gamma-ray repeater SGR J1935+2154 entered its intense outburst episode ***-HXMT carried out about one month observation of the source.A total number of 75 bursts were detected during this activity episode by Insight-HXMT,and persistent emission data were also *** report on the spin period search result and the phase distribution of burst start times and burst photon arrival times of the Insight-HXMT high energy detectors and Fermi/Gamma-ray Burst Monitor(GBM).We find that the distribution of burst start times is uniform within its spin phase for both Insight-HXMT and Fermi/GBM observations,whereas the phase distribution of burst photons is related to the type of a burst’s energy *** bursts with the same spectrum have different distribution characteristics in the initial and decay episodes for the activity of magnetar SGR J1935+2154.

关键词： spectrum Fermi distribution